Staurolite and Hemimorphite Physical Properties

Staurolite

Hemimorphite

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Physical Properties

Tenacity

Brittle

Solubility

Soluble

Durability

Specific Gravity

3.7-3.83.30-3.50

1 7.18

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Fracture

Subconchoidal, Conchoidal

Uneven, ConchoidalWalter Schumann, Conchoidal

Cleavage

Distinct on {010}

Perfect on {110}, poor on {101}, {001} rare

Mohs Hardness

7-7.55

2 10

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Chemical Composition

(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.

Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Staurolite and Hemimorphite Chemical Formula

While comparing Staurolite and Hemimorphite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Staurolite and Hemimorphite chemical formula.

Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Chemical formula of Hemimorphite- Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Staurolite and Hemimorphite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Hemimorphite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Hemimorphite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 3.30-3.50 whereas that of Hemimorphite is 3.30-3.50.